Whether you’re in Sydney, Melbourne, Perth, Brisbane, or out in regional Australia, having a reliable hot water supply is essential. With rising energy costs and a growing focus on efficiency, many Australians are switching to tankless electric water heaters. These compact, on-demand systems heat water instantly, saving space and reducing energy waste compared to traditional storage tanks.
In this guide, we’ll cover the best tankless electric water heaters available in Australia for 2025, what makes them ideal for local conditions, and how to choose the right one for your home. We’ll also share installation and maintenance tips, plus a critical but often-overlooked part of your plumbing system that can save you from costly repairs.
Why Choose an Electric Tankless Water Heater in Australia?
Tankless electric systems are increasingly popular across Australia for several reasons:
- Space-saving design: Perfect for apartments, small homes, and granny flats.
- On-demand heating: No more running out of hot water during showers.
- Energy efficiency: Only heats water when you turn on the tap—no standby losses.
- Easy installation: No flue or gas connections required.
- Eco-friendly: Pairs well with solar PV systems for near-zero operating costs.
Best Overall: Stiebel Eltron DHX 13 AU
The Stiebel Eltron DHX 13 AU is engineered for Australian conditions, delivering stable hot water even with fluctuating inlet temperatures. It’s compact, efficient, and well-suited to both residential and light commercial applications.
- Power: 13kW – ideal for single-bathroom homes or point-of-use installations.
- Temperature control: Electronic for consistent water temperature.
- Build quality: German-engineered for long service life.
- Warranty: Strong manufacturer support in Australia.
Other Top Tankless Electric Water Heaters in Australia
Rheem Pronto Electric Continuous Flow
Reliable and backed by Rheem’s strong service network in Australia, the Pronto range offers dependable hot water for small to medium households.
Zip Instantaneous Electric Units
Best known for commercial and kitchen use, Zip’s instant units are great for under-sink installations, delivering hot water quickly and efficiently.
Dux Always Hot Electric
Compact and easy to install, this Dux model is well-suited for apartments and small dwellings needing consistent point-of-use hot water.
Bosch Tronic 3000 Series
Designed for smaller loads such as kitchen sinks and office bathrooms, Bosch’s Tronic units are highly efficient and durable.
How to Choose the Right Tankless Electric Water Heater in Australia
Before buying, consider the following factors:
- Climate: In cooler regions like Tasmania or the Southern Highlands, choose a higher kW rating for better performance.
- Usage: Whole-home vs point-of-use—most electric units in Australia are point-of-use due to power limitations.
- Electrical capacity: Check your switchboard and wiring; higher kW units require dedicated circuits.
- Flow rate needs: Match the unit’s GPM to your simultaneous usage demands.
Pro Tip: If pairing with rooftop solar, run your tankless heater during daylight hours to maximise renewable energy use.
Installation Considerations
Australian standards require licensed electricians to install electric water heaters. Key points include:
- Ensuring correct wiring size and breaker capacity.
- Locating the unit close to the point of use to reduce wait times and heat loss.
- Mounting with adequate ventilation and access for servicing.
Maintenance Tips
While tankless electric water heaters need little maintenance, you can extend their life by:
- Flushing the unit annually in hard water areas to prevent scale buildup.
- Checking filters or screens regularly.
- Inspecting electrical components annually for safety.
The Overlooked Side of Your Plumbing System
Having a reliable hot water system is great—but what about when that water leaves your home? Many rural and semi-rural Australian properties use septic tanks, and increased hot water use can stress a poorly maintained system. Neglecting septic maintenance can lead to unpleasant odours, slow drains, and expensive repairs.
Preventative care is far more cost-effective than emergency repairs, and it keeps your entire plumbing system running smoothly.
SEPTIFIX – Protect Your Septic System
SEPTIFIX is the #1 septic tank treatment trusted in Australia, the US, and Canada. These easy-to-use tablets dissolve in your toilet, releasing oxygen and beneficial bacteria to break down waste, sludge, and grease while neutralising foul smells.
Benefits include:
- Eliminates septic odours in just days.
- Prevents costly pump-outs and blockages.
- Safe for all septic systems and eco-friendly.
- Simple monthly use—just flush one tablet.
Pairing your electric tankless water heater with regular SEPTIFIX use means you’re protecting both comfort and infrastructure.
Final Thoughts
For Australian homes in 2025, the Stiebel Eltron DHX 13 AU is the best overall tankless electric water heater, offering efficient performance, reliability, and a compact design suited to local conditions. The Rheem Pronto Electric, Zip Instantaneous units, Dux Always Hot Electric, and Bosch Tronic 3000 Series are also excellent choices for various needs and budgets.
And remember—endless hot water is only part of the picture. Maintaining a healthy septic system with SEPTIFIX ensures your home’s plumbing runs smoothly year-round.
Order SEPTIFIX Today – Keep Your Septic Tank Healthy and Odour-Free
Reliable hot water plus a trouble-free septic system—that’s the Australian way to live comfortably and smartly.